首先

您是否遇到了在 Elasticsearch 升级到版本8后无法执行 curl 命令的情况？

$ curl -s http://localhost:9200/

执行结果

{
   "error":{
      "root_cause":[
         {
            "type":"security_exception",
            "reason":"missing authentication credentials for REST request [/]",
            "header":{
               "WWW-Authenticate":[
                  "Basic realm=\"security\" charset=\"UTF-8\"",
                  "ApiKey"
               ]
            }
         }
      ],
      "type":"security_exception",
      "reason":"missing authentication credentials for REST request [/]",
      "header":{
         "WWW-Authenticate":[
            "Basic realm=\"security\" charset=\"UTF-8\"",
            "ApiKey"
         ]
      }
   },
   "status":401
}

这次是关于解决这个问题的方法。

验证环境

• Ubuntu 22.04.2 LTS

lsb_release -a1

Elasticsearch 8.10.3
curl 7.81.0-1ubuntu1.14

apt list –installed | grep curl2

Python 3.10.12

python3 -V

解决方案

解决的方法是输入Elasticsearch的用户名和密码。
以下是为不知道Elasticsearch密码的人准备的密码重置方法3。

Elasticsearch密码重置

重置Elasticsearch密码的命令

$ sudo /usr/share/elasticsearch/bin/elasticsearch-reset-password -u elastic

执行结果

This tool will reset the password of the [elastic] user to an autogenerated value.
The password will be printed in the console.
Please confirm that you would like to continue [y/N]y


Password for the [elastic] user successfully reset.
New value: ＜新しいパスワード＞

$ export ELASTIC_PASSWORD="＜新しいパスワード＞"

请注意：一旦退出shell，export的变量将消失。

确认

使用curl进行连通性测试。

$ curl -u elastic:$ELASTIC_PASSWORD -s http://localhost:9200/

执行结果

{
  "name" : "＜ホスト名＞",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "＜クラスターのID＞",
  "version" : {
    "number" : "8.10.3",
    "build_flavor" : "default",
    "build_type" : "deb",
    "build_hash" : "c63272efed16b5a1c25f3ce500715b7fddf9a9fb",
    "build_date" : "2023-10-05T10:15:55.152563867Z",
    "build_snapshot" : false,
    "lucene_version" : "9.7.0",
    "minimum_wire_compatibility_version" : "7.17.0",
    "minimum_index_compatibility_version" : "7.0.0"
  },
  "tagline" : "You Know, for Search"
}

通过使用curl命令，您可以在Elasticsearch中使用该API。

用Python进行确认（额外）

我将尝试使用Python在requests模块中执行与curl相同的操作，进行基本认证4。

import requests
from requests.auth import HTTPBasicAuth
import json

elastic_url = 'http://localhost:9200/'

# Basic Authentication
# https://requests.readthedocs.io/en/latest/user/authentication/
basic = HTTPBasicAuth('elastic', '＜新しいパスワード＞')
headers = {
    'Content-Type': 'application/json',
}

response = requests.get(elastic_url, auth=basic, headers=headers)
print(json.dumps(response.json(), indent=4))

$ python3 elastic_requests.py

执行后会得到与curl相同的结果。

执行结果

{
  "name" : "＜ホスト名＞",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "＜クラスターのID＞",
  "version" : {
    "number" : "8.10.3",
    "build_flavor" : "default",
    "build_type" : "deb",
    "build_hash" : "c63272efed16b5a1c25f3ce500715b7fddf9a9fb",
    "build_date" : "2023-10-05T10:15:55.152563867Z",
    "build_snapshot" : false,
    "lucene_version" : "9.7.0",
    "minimum_wire_compatibility_version" : "7.17.0",
    "minimum_index_compatibility_version" : "7.0.0"
  },
  "tagline" : "You Know, for Search"
}

请参考以下网站